/**
  * @param array $terms
  * @param $taxonomy
  * @param int $parent
  * @param int $order
  */
 public static function createTaxonomies(array $terms, $taxonomy, $parent = 0, $order = 0)
 {
     if (count($terms) === 0) {
         return;
     }
     // only keep terms with existing entries in terms table
     $terms = Term::whereIn('name', $terms)->pluck('name')->all();
     // create taxonomy entries for given terms
     foreach ($terms as $term) {
         Taxonomy::firstOrCreate(['taxonomy' => $taxonomy, 'term_id' => Term::where('name', $term)->first()->id, 'parent' => $parent, 'sort' => $order]);
     }
 }